FortisVPN for Windows will not install
The installer is blocked, asks for permission, or stops half way.
Last updated September 25, 2026
1. Windows protected your PC
If a blue screen says Windows protected your PC, click More info, then Run anyway. Only do this for the file you downloaded from our download page.
2. Click Yes
When Windows asks Do you want to allow this app to make changes to your device?, click Yes. On a work or school computer, you may need the person who manages it.
3. Restart and try again
Restart your PC and open the installer again.
4. Remove the old Fortis first
Open Settings, then Apps, then Installed apps. Find Fortis VPN, click the three dots and choose Uninstall. Restart, then install again.
5. Pause your antivirus
Some antivirus apps stop the install. Pause it for a few minutes, install Fortis, then turn it back on.
Fortis works on Windows 10 and 11. Step by step: Install Fortis on Windows.
Still stuck?
Our support team is available 24/7. Open the chat bubble in the bottom-right corner of this page, or email [email protected] with your device, app version, and the server location you were trying to use.
